Ubuntu.comUB:CVE-2019-7308CVE-2019-7308
5.6 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
4.7 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:C/I:N/A:N
0.001 Low
EPSS
Percentile
22.3%
kernel/bpf/verifier.c in the Linux kernel before 4.20.6 performs
undesirable out-of-bounds speculation on pointer arithmetic in various
cases, including cases of different branches with different state or limits
to sanitize, leading to side-channel attacks.
Bugs
Notes
| Author | Note |
|---|---|
| tyhicks | Mitigation for this vulnerability is available by setting the kernel.unprivileged_bpf_disabled sysctl to 1: $ sudo sysctl kernel.unprivileged_bpf_disabled=1 $ echo kernel.unprivileged_bpf_disabled=1 |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | linux | < 4.15.0-47.50 | UNKNOWN |
| ubuntu | 18.10 | noarch | linux | < 4.18.0-17.18 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws | < 4.15.0-1035.37 | UNKNOWN |
| ubuntu | 18.10 | noarch | linux-aws | < 4.18.0-1012.14 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-aws-hwe | < 4.15.0-1035.37~16.04.1 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-azure | < 4.18.0-1014.14~18.04.1 | UNKNOWN |
| ubuntu | 18.10 | noarch | linux-azure | < 4.18.0-1014.14 | UNKNOWN |
| ubuntu | 14.04 | noarch | linux-azure | < 4.15.0-1041.45~14.04.1 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-azure | < 4.15.0-1041.45 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-azure-edge | < 4.18.0-1014.14~18.04.1 | UNKNOWN |
References
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=979d63d50c0c0f7bc537bf821e056cc9fe5abd38
launchpad.net/bugs/cve/CVE-2019-7308
nvd.nist.gov/vuln/detail/CVE-2019-7308
security-tracker.debian.org/tracker/CVE-2019-7308
ubuntu.com/security/notices/USN-3930-1
ubuntu.com/security/notices/USN-3930-2
ubuntu.com/security/notices/USN-3931-1
ubuntu.com/security/notices/USN-3931-2
www.cve.org/CVERecord?id=CVE-2019-7308
www.openwall.com/lists/oss-security/2019/02/02/3
Related
5.6 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
4.7 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:C/I:N/A:N
0.001 Low
EPSS
Percentile
22.3%